mineral

Tumbled hematite

Hematite (iron(III) oxide, Fe₂O₃)

AI-generated identification · may be incorrect

Typically metallic to submetallic luster, steel-gray to reddish-brown color, opaque, and Mohs hardness 5–6.5; this rounded, polished form has no visible cleavage and a dense, heavy feel (specific gravity about 5.3).

Identified August 22, 2026More mineral →

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Physical properties

Formation & geological history

Forms through oxidation of iron-rich rocks, hydrothermal activity, sedimentary iron formation, or weathering; deposits range from Precambrian banded iron formations to younger supergene zones.

Uses & applications

Used as an iron ore, pigment, polishing abrasive, and ornamental tumbled stone; commonly marketed as “magnetic hematite,” though many such beads are actually synthetic ferrite.

Geological facts

Its diagnostic streak is cherry-red to reddish-brown, unlike the black streak of magnetite. Hematite is weakly magnetic or nonmagnetic, while synthetic magnetic hematite is strongly attracted to a magnet.

Field identification & locations

Common localities include Brazil, Australia, China, India, and the Lake Superior region of North America. Test an uncoated surface for a red streak and compare its unusually high density; polishing can obscure these clues.